Car insurance is not just a necessity; it is a requirement by law. Be honest about your products and place yourself in the buyer’s position. Sell people only the amount of insurance that they actually need. Your success will depend on how you represent your products and how you treat your clients. Selling Over the Phone Or Computer. When your customer isn't in the same room, your voice takes center stage. Speak confidently, with an upbeat, friendly, warm and inviting tone to establish rapport. Stand up while speaking and smile as you talk; the gesture will come through in your voice.